<nz-layout class="layout">
  <div class="root_sidebar">
    <app-sidebar [isCollapsed]="isCollapsed"></app-sidebar>
  </div>
  <div class="site">
    <header>
      <app-header [isCollapsed]="isCollapsed" (toggle)="toggleCollapsed()"></app-header>
    </header>
    <main>
      <nz-content>
        <div class="nz_content">
          <router-outlet></router-outlet>
        </div>
      </nz-content>
    </main>
    <footer>
      <app-footer></app-footer>
    </footer>
  </div>
</nz-layout>